Cub Cadet 70 Gas tank
 

I have a Cub Cadet 70 Well two one parts Tractor other a Project Tractor well One was missing Gas tank The one that Has Gas tank had gas sitting in it for who knows how long. Baiscly what ive done is Pulled gas tank and have one gallon of Gunk Carb dip Soaking inside of the Tank but its bad in there alot of Debris Any suggestions i would greatly appeciate

There are lots of techniques that people try to clean these out. First, after emptying the tank, you might try some pieces of gravel or small rocks in the tank (clean the rocks first of course) and gently roll them around in there to loosen any rusted chunks of debris. Empty and repeat if necessary. If it isn't too bad, then I take mine to my buddy to be bead blasted or you could give it an acid bath or take it to a radiator specialist for cleaning and once I even used some automotive rust remover with some success, but it didn't clean it out at the top of the tank as well as I would have liked. Whatever you decide on, it helps to take a little diesel fuel and rinse it when you are done to prevent it from flash rusting inside. I'm sure others will post what they do on this matter and offer better suggestions than what I have in my post.

Cub Cadet 123

you will get many different suggestions on here. so i will give you an idea of what i've done in the past with mower and motorcycle tanks. i have used BB's and blue gravel. i use kerosene as the sloshing liquid. if it's not to bad i just put bb's in and slosh it around for a while. but if it's real bad then i put the blue gravel in and strap it to my fourwheeler and go for a ride. if there are no holes in the tank, i use a chemical lining called: kream, creme, kreem. i can't remember the exact spelling, but i get it at my local motorcycle shop. just follow the directions. it coats the inside and makes it nice and "new". there will be more that will post with some great ideas. hope it goes good for you!!!! jeff

I've used a combination of muriatic acid and drywall screws on rusty motorcycle and tractor tanks with great success. Throw in a large box of the screws, then fill the tank with full strength muriatic acid. You should see small bubbles coming up from the rusty areas immediately due to the acid. Shake the screw around every 15 to 20 minutes to help keep things agitated and remove gunk. After a day of doing this, it will be nice and clean. Make sure you wear safety gear with the strong acid and have a spot to dump the dirty solution. The screws are still useable, they just help scrub the inside.

I have not tried it my self, but a suggestion on a motorcycle list was to put in a few pounds of drywall screws in tank, wrap a large towel around it and tumble it in a clothes dryer.